US4462884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low reflectance, low emissivity sputtered film
Assignee: PPG Industries Ohio Inc
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Filing: 1983-07-25
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Granted: 1984-07-31
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Expires: 2003-07-25
Abstract
Abstract A method is disclosed for producing by cathode sputtering a silver/copper coated article which duplicates the low reflectance colored appearance of a silver/copper coated article produced by wet chemical deposition. The method involves depositing the silver layer in a discontinuous agglomerated state.
Inventors
- 👤 F. Howard Gillery
- 👤 Russell C. Criss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:00
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/40; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/18; C03C2217/00; C03C2217/40; C03C2217/42; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A method for producing a low reflectance transparent colored film on a transparent substrate comprising the steps of: a. sputtering silver onto a surface of the substrate at a rate sufficient to permit agglomeration of the silver particles to form a discontinuous film; b. discontinuing the sputtering of silver before said agglomerated silver particles form a continuous film; c. sputtering copper onto the discontinuous agglomerated silver to form a transparent two-layer silver/copper film having a low reflectance colored appearance.
Claim 2
Independent Claim
79 words
A method for producing a low reflectance transparent colored film on a transparent substrate comprising the steps of: a. sputtering silver onto a surface of the substrate at a rate sufficient to permit agglomeration of the silver particles to form a discontinuous film; b. discontinuing the sputtering of silver before said agglomerated silver particles form a continuous film; c. sputtering copper onto the discontinuous agglomerated silver to form a transparent two-layer silver/copper film having a low reflectance colored appearance.
Claim 3
Dependent Claim
35 words
A method according to claim 1, wherein silver is sputtered onto a transparent glass substrate to form a discontinuous agglomerated film having a transmission minimum measured on the substrate of about 40 to 55 percent.
Claim 4
Dependent Claim
21 words
A method according to claim 2, wherein said discontinuous agglomerated film has a transmission minimum of about 42 to 50 percent.
Claim 5
Dependent Claim
21 words
A method according to claim 3, wherein said discontinuous agglomerated film has a transmission minimum of about 44 to 46 percent.
Claim 6
Dependent Claim
37 words
A method according to claim 1, wherein the sputtering of a discontinuous silver film is accomplished by applying power to the cathode at a sufficiently low level to allow silver deposited on the substrate surface to agglomerate.
Claim 7
Dependent Claim
36 words
A method according to claim 1, wherein the sputtering of a discontinuous silver film is accomplished by sputtering in an inert atmosphere at sufficiently high pressure to cause agglomeration of silver deposited on the substrate surface.
Claim 8
Dependent Claim
35 words
A method according to claim 1, wherein the sputtering of a discontinuous silver film is accomplished by sputtering silver onto a surface sufficiently hot to cause agglomeration of the silver deposited onto the substrate surface.
Claim 9
Dependent Claim
37 words
A method according to claim 1, wherein the sputtering of a discontinuous silver film is accomplished by sputtering silver onto a surface of sufficiently low energy to allow agglomeration of the silver deposited onto the substrate surface.
References Cited (Backward Citations)
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Cited
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US3925182A
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US4166018A
Cited
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Cited
US4009090A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |